Ilias ApalodimasandTom Rini
1174c99ab4
Currently, the bi_dram[] information is stored in the board info structure (bd). Because bd is only valid after reserve_board(), dram_init_banksize() must be called late in the initialization process. This limitation is problematic, as it forces us to rely on a variety of bespoke functions to determine board RAM, bank memory sizes, and other early setup requirements. By moving bi_dram[] into the global data (gd), we can run it earlier. This is particularly convenient since boards define their own dram_init_banksize() routines, which do not always rely on parsing Device Tree (DT) memory nodes. Additionally, U-Boot defaults to relocating to the top of the first memory bank. While boards currently use custom functions to override this behavior, having the DRAM bank information available earlier in gd makes relocating to a different bank trivial and standardizes the process. Reviewed-by: Anshul Dalal <anshuld@ti.com> Tested-by: Michal Simek <michal.simek@amd.com> # Versal Gen 2 Vek385 Tested-by: Anshul Dalal <anshuld@ti.com> Reviewed-by: Simon Glass <sjg@chromium.org> Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org> Tested-by: Christophe Leroy (CS GROUP) <chleroy@kernel.org>
46 lines
1.3 KiB
C
46 lines
1.3 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2017 Beckhoff Automation GmbH & Co. KG
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* Patrick Bruenn <p.bruenn@beckhoff.com>
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*/
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#include <init.h>
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#include <asm/global_data.h>
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DECLARE_GLOBAL_DATA_PTR;
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phys_size_t get_effective_memsize(void)
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{
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/*
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* WARNING: We must override get_effective_memsize() function here
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* to report only the size of the first DRAM bank. This is to make
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* U-Boot relocator place U-Boot into valid memory, that is, at the
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* end of the first DRAM bank. If we did not override this function
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* like so, U-Boot would be placed at the address of the first DRAM
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* bank + total DRAM size - sizeof(uboot), which in the setup where
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* each DRAM bank contains 512MiB of DRAM would result in placing
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* U-Boot into invalid memory area close to the end of the first
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* DRAM bank.
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*/
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return get_ram_size((void *)PHYS_SDRAM_1, 1 << 30);
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}
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int dram_init(void)
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{
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gd->ram_size = get_ram_size((void *)PHYS_SDRAM_1, 1 << 30);
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gd->ram_size += get_ram_size((void *)PHYS_SDRAM_2, 1 << 30);
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return 0;
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}
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int dram_init_banksize(void)
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{
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gd->dram[0].start = PHYS_SDRAM_1;
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gd->dram[0].size = get_ram_size((void *)PHYS_SDRAM_1, 1 << 30);
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gd->dram[1].start = PHYS_SDRAM_2;
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gd->dram[1].size = get_ram_size((void *)PHYS_SDRAM_2, 1 << 30);
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return 0;
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}
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